| Named By: | Peter M. Galton in 1978 |
| Time Period: | Early Jurassic, 199-189 Ma |
| Location: | South Africa - Upper Elliot Formation |
| Size: | About 1 meter long |
| Diet: | Herbivore |
| Fossil(s): | Remains of several individuals |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Genasauria | Lesothosauridae | |
| Also known as: | | Stormbergia | |
Lesothosaurus was a type of omnivorous ornithischian dinosaur. It was named by paleontologist Peter Galton in 1978, the name meaning "lizard from Lesotho". The genus has only one valid species, Lesothosaurus diagnosticus.